TY  - RPRT
TI  - Geologic map of Montana
AU  - C. P. Ross
AU  - D. A. Andrews
AU  - I. J. Witkind
PY  - 1955
DO  - 10.3133/70046740
UR  - https://pubs.usgs.gov/publication/70046740
ID  - 70046740
ER  -